1. The young tree, originally bent, has been brought into the vertical position by adjusting the three guy-wire tensions to AB = 0, AC = 10 lb, and AD = 15 lb. Determine the force and moment reactions at the trunk base point O. Neglect the weight of the tree.
2. The vertical and horizontal poles at the traffic-light assembly are erected first. Determine the additional force and moment reactions at the base O caused by the addition of the three 100-lb traffic signals B, C, and D. Report your answers as a force magnitude and a moment magnitude.
